1 files changed, 41 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/pr27996.ll b/llvm/test/Transforms/InstCombine/pr27996.ll
new file mode 100644
index 00000000000..3fefe6e7839
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/pr27996.ll
@@ -0,0 +1,41 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+
+@i = constant i32 1, align 4
+@f = constant float 0x3FF19999A0000000, align 4
+@cmp = common global i32 0, align 4
+@resf = common global float* null, align 8
+@resi = common global i32* null, align 8
+
+define i32 @foo() {
+entry:
+  br label %while.cond
+
+while.cond:
+  %res.0 = phi i32* [ null, %entry ], [ @i, %if.then ], [ bitcast (float* @f to i32*), %if.else ]
+  %0 = load i32, i32* @cmp, align 4
+  %shr = ashr i32 %0, 1
+  store i32 %shr, i32* @cmp, align 4
+  %tobool = icmp ne i32 %shr, 0
+  br i1 %tobool, label %while.body, label %while.end
+
+while.body:
+  %and = and i32 %shr, 1
+  %tobool1 = icmp ne i32 %and, 0
+  br i1 %tobool1, label %if.then, label %if.else
+
+if.then:
+  br label %while.cond
+
+if.else:
+  br label %while.cond
+
+while.end:
+  %1 = bitcast i32* %res.0 to float*
+  store float* %1, float** @resf, align 8
+  store i32* %res.0, i32** @resi, align 8
+  ret i32 0
+
+; CHECK-NOT: bitcast i32
+}
+